TAB type easy open lid referred to as "open type tank cover, this type of lid opening is convenient, is open as long as the pull on the disc ring and hold in tear open the lid. TAB type easy open lid open principle is: prefabricated indentation in the lid open first, to reduce the local strength, opens in the TAB near the relatively concentrated stress, under the action of shear force, is the indentation cracking and open it. Generally smaller tank inside and outside differential pressure, the shear force produced by indentation place small and uniform, can not to crack, to ensure the safety during transportation, storage, canned products.

TAB type easy by two forms: a za is a small mouth, a TAB when you pull up tank cover open a sip, the small mouth can be sucked out or not within the fluid, the other is a big type, TAB up almost the entire pot cover is opened, in order to remove the solid, powder or highly viscous dense built-in objects. This paper mainly discuss the small mouth easy open cover, this cover technique widely used in the cans, at present, the small mouth type easy open by two kinds: all tear and all tear. Two kinds of tank cover each have advantages and disadvantages.

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